Air conditioning system



July 12, 1938. w. CHILD AIR CONDITIONING SYSTEM Filed June 4, 1936 2Sheets-Sheet l 5 mm H T m w; 0 v. w W W Q N A L H c Aw L o m h E F \\K\\A\\ mv f .rq a E I o m6 ow Mn w 31: 3. Wm 1,, t Q v m\ MPU W\ w NM huhn v mh m *h $1 QM i 2 Sheets-Sheet 2 ATTORNEYS.

L. W. CHILD AIR CONDITIONING SYSTEM Filed June 4, 1936 July 12, 1938.

I o\ Q Latented July 12, 1938 UNITED STATES.

,izatn AIR CONDITIONING SYSTEM Lachlan w. Child, South Bend, Ina,assignor, by

mesne assignments, to Air, Devices Corporation, Chicago, 111., acorporation of Delaware Application June 4, 1936, Serial No. 83,465

3 Claims.

prises upper and lower parts spaced apart to provide an annular outletor mouth, with the fresh air supplied through the central portion of onepart and room air (to be recirculated) through the central portion ofthe other part. After being conditioned, for example by a cooling coilinthe path of the air, the mixed cooled air is blown horizontallyoutward in all directions, just below the ceiling by means such as acentrifugal fan.

Various features of novelty relate to the provision and arrangement ofshutters or the like controlling the fresh air supply, to the use of afreshair conduit simulating one of the beams of a beamed ceiling, or tosupplying the air through the space above a false ceiling suspendedbelow the true ceiling of the room, and to other novel combinations anddesirable particular arrangements shown in the accompanying drawings, in

which:

Figure 1 is a perspective view of the upper part of the room, with theconnections outside the room shown diagrammatically;

Figure 2 is a view, partly in elevation and partly in vertical section,showing the ceiling fixture and the hollow beam through which fresh airis supplied; and I Figure 3 is a. similar view showing a fixture towhich fresh air is supplied from the space above of the upper part Itmay, as a matter of convenience of manufacture, be a separate annularstamping or the like 22. The part 22 and the part 20 are spaced apart toform an annular outlet or mouth, through which the conditioned air isforced substantially horizontally in all directions just below theceiling.

The central portion of the lower part 26 is cut away to form an intakeopening for room air to be recirculated; this opening is showndetachably covered by a grille or the like 24 carrying a filter 26.

The upper part 16 supports a vertical electric motor 28 driving acentrifugal fan or blower 30 about the periphery of which is a coolingcoil 32 mounted on the posts l8. Cooled liquid refrigerant is supplied,from any suitable remote location outside the room, through a conduit34, to an expansion valve 36 which opens into the coil 32. Therefrigerant, after taking up heat in the 10 coil 32, passes as a gasthrough a conduit 38 to a motor-driven compressor 40, which delivers itthrough a water-cooled condenser coil 42 to an accumulator 44, fromwhich it is again drawn ofi through the conduit 34,. 5

Moisture condensed by the coil 32 drips into an annular drip pan or thelike 46 supported by the lower part 20, from which it is forced througha drain tube 41 by any suitable means, for example as described in myapplication No. 729,544, filed June 8, 1934, which has become Patent No.2,082,- 44 June 1,.1937 or my application No. 83,466, filed concurrentlyherewith.

Fresh air enters, from outside the room, through a hollow beam 48 on theceilingl This beam is blocked ofi just beyond the fixture describedabove, by a partition 58, leaving a dead end or false duct 52. The trueduct end of the beam is formed with an outlet flange 5i sealinglyembraced by an annular rubber seal 56 carried by a cylindrical flangeabout the central opening of the stamping 22. Thus fresh air entersthrough the top of the fixture and room air enters through the bottom ofthe fixture.

The relative volumes of fresh. air and room air 5 is determined by meanssuch as a verticallyshiftable horizontal shutter or gate 68, slidablyguided by pins 62 carried by a spider 66 secured by the bolts 66 whichhold the grille 2E.

The shutter has at its center a nut 6t threaded on an operating bolt illrotatably mounted in-a part 12 carried by the spider 6d. The lower endof the bolt lil is squared for engagement by a socket wrench, or isotherwise formed for engagement with an operating tool, and isaccessible through a sleeve it at the center of the grille 2d and filter2t.

By turning the bolt 16, the shutter 6t: is shifted vertically to varythe proportions of fresh and room air. In the lowermost position asshown, only fresh air is supplied; in the uppermost position of theshutter only room air is supplied; in intermediate positions variousmixtures of fresh and room air are supplied.

Figure 3 shows a somewhat difierent fixture,

with fresh air supplied through. the space above a false ceilingsupported'below the true ceiling of the room by means such as hangers82. Parts corresponding to parts in Figure 2 are indicated by the samereference characters increased by I 00.

In this fixture, cold water or brine is circulated through a coolingcoil I32, which is arranged in the annularmouth between upper and lowerparts I22 and I20. The centrifugal fan I30 in this case is a double fan,the lower part acting on room air coming up through a grille I24 and afilter I26 held by spring latches I21. The room air is controlled byshutters lillconnected by a bar I68 for common actuation by a pull rodI10 extending down far enough for convenient operation.

The upper part of the fan I30 acts on fresh air brought in through aduct I48 arranged in the space above the false ceiling 80, under thecontrol of a shutter shown as a butterfly valve 260 operated by avertical operating rod 210.

Both fixtures may also, if desired, be used as lighting fixtures, asexplained in my application No. 32,256, filed July 19, 1935 and whichhas become Patent No. 2,069,816, Feb. 9, 1937.

While two illustrative embodiments have been described in detail, it isnot my intention to limit the scope of the invention to those particularembodiments, or otherwise than by the terms of the appended claims.

I claim:

1. An air-conditioning fixture comprising upper and lower partsconnected in spaced relation to provide an annular mouth openingapproximately horizontally outward in all directions,

a fresh air supply connected to the central portion of one of saidparts, a room air intake provided at the central portion of the other ofsaid parts, air-circulating means for taking air from said supply andfrom said intake and blowing it out in all directions through saidannular mouth valve means between said parts for proportioning therelative amounts of fresh air and room air, and a cooling coil in thepath of the air passing through said fixture.

2. An air conditioning fixture comprising a casing formed with aperipheral annular air outlet, air inlets in the top and bottom of saidcasing, one of said inlets being adapted to receive air from the spaceto be conditioned and the other to receive air from outside said space,means for circulating air through the casing, means in the casing forconditioning the circue .lated air, and a shutter shiftable between saidinlets to control the proportions, of air taken in through said inlets.

3. An air conditioning fixture comprisinga casing formed with aperipheral annular air outlet, air inlets in the top and bottom of saidcasing, one of said inlets being adapted to receive air from the spaceto be conditioned and the other to receive air from outside said space,an annular centrifugal blower having an open center communicating on itsopposite sides with said inlets respectively and discharging throughsaid air outlet, and a disc shiftable axially through the center of saidblower to control the proportions of air taken in through said inlets.

LACHLAN w. CHILD.

